JP2001041217A - Anchor bolt for face of slope, and face of slope execution method using the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To charge fixer into the bottom of an anchor bolt by the spiral reverse rotation operation of an anchor bolt main body. SOLUTION: This anchor bolt 1 has a pointed tip part 20 of a spiral bar-like body which is continuously bent, and a rotary adaptor connection part 21 at the rear end of the bar-like body. A rotary adaptor 3 is attached to the rotary adaptor connection part 21 roratably in normal and reverse directions by forming a groove 211 for reverse rotation on the connection part 21. In execution, the anchor bolt 1 is embedded in a face of slope S by the normal rotation due to a rotating drill 4. In another case, the anchor bolt 1 is inserted into a hole H which is formed by a boring machine and has a diameter larger than a spiral diameter of the anchor bolt 1. Afterward, a periphery of the anchor bolt 1 for the face of slope is filled with fixer 10 or the like. The rotating drill 4 is then rotated in a reverse direction, and the fixer 10 is charged into the bottom of the hole H. The anchor bolt 1 is thus fixed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slope anchor bolt and a method of constructing a slope using the same.

[0002]

2. Description of the Related Art As a conventional method of constructing a slope, a "cast-in-place grid frame method using a grooved spacer" (JP-A-62-4)
No. 5833), “Construction method of legal framework” (Japanese Unexamined Patent Publication No. Sho 62-1)
No. 21235), "Construction method of legal form" (Japanese Patent Application Laid-Open No. 63-289119), "In-situ casting method using a trapezoidal simple form" (Japanese Patent Application Laid-Open No. 63-206520),
"Injection method frame method" (JP-A-62-1928),
"Slope stabilization method" (JP-A-53-107103)
Etc. are known.

In these conventional examples, when mortar is sprayed or vegetated on a slope, an anchor pin used for fixing a protective net, a wire mesh, etc. to the slope is a shaft driven into rock, crushed rock or sandy soil. The part was formed in a straight straight line.

[0004] Since the shaft portion is formed in a straight, straight shape, it is very easy to come off even if it is driven into a slope, and it comes off due to the action of hooking a protective net or the like held by an anchor pin during work. I had. Therefore, in order to further increase the reliability, there is a problem that an excessive number of anchor pins are driven into the slope.

[0005] Further, the slope is not always made of a fixed soil, and the slope made of sedimentary rock or sandy soil has a problem that the conventional anchor pin lacks strength. In other words, when driving anchor pins into rock,
Drill a hole with a drill or rock drill and drive an anchor pin into the hole. However, if the hole having the same diameter as the anchor pin is provided, the excavated powder hinders the driving of the anchor pin into the hole, and there is a problem that the anchor pin cannot be fixed if the hole having a diameter larger than the anchor pin is provided.

[0006] In order to overcome the problems of the prior art, the inventor of the present application has made an attempt to solve the above-mentioned problems by applying Japanese Patent Application No. Hei.
No. 59616 (prior art 1) states that "a hole having a shoulder portion and having an S-shaped curved continuous shape and having a diameter slightly larger than the diameter of an anchor pin formed on a slope by a drill or rock drill. And anchor the lath net, the net or the vegetation base material to the slope, and the curved shoulder portion of the anchor pin contacts the inner periphery of the hole and is fixed to the installation location, and A hole having a diameter slightly larger than the diameter of the anchor pin having a shoulder portion at a place where the anchor pin is to be installed on the slope and having a curved shape that is continuously curved in an S-shape is formed with a drill or rock drill, and formed. An anchor pin having a shoulder portion in the hole and having a curved shape continuous in an S shape is driven in, and a lath net, a net or a vegetation base material is fixed to the slope, and the curved shoulder portion of the anchor pin contacts the inner periphery of the hole. To the installation location Have filed a fixing method "of the anchor pin to slope, characterized by a constant.

Further, the applicant of the present invention and the present inventor described in Japanese Patent Application No. 10-368156 (prior art 2) that "the tip of a continuously curved spiral rod is sharpened conically, A cylindrical lower surface is formed on the anchor pin body and the anchor pin body, which form a rotation guide blade that is a spiral-shaped protrusion along the spiral surface from the part toward the rear and form a hammer driving part bent at the rear end. And an upper end inclined notch in which the lower end is opened on the side surface of the cylinder and the upper end of the hole is inclined downward in the spiral rotation direction of the anchor pin body, and a drill hole connectable to a rotary hammer drill is provided on the upper surface of the cylinder. An anchor pin for a slope which is provided so as to be able to be attached with an adapter for rotary driving provided with a.

Further, as a conventional slope construction method using a rock bolt method or the like, a hole is dug in the ground, a rock bolt is inserted into the hole, and a fixing material such as cement milk is poured into a gap to form a slope. A fixing method is known.

[0009]

However, the "anchor pin having a shoulder portion and having an S-shaped curved continuous shape" described in the prior art 1 and the "tip portion of the prior art 2 being sharpened conically. Forming a rotation guide blade that is a spiral-shaped projection along the spiral surface from the end toward the back, even if it has slopes with lots of pebbles or small rocks, or slopes with loose ground. Then, when the anchor pin is driven, there is a problem in that the pin does not rotate accurately and is easily pulled out.

Further, in the case of a slope construction method using a rock bolt method or the like, in the case of a sedimentary rock soil or a sandy soil,
When the hole for the anchor bolt (anchor pin) was drilled and the drill bit was pulled out, the inside of the drilled hole immediately collapsed, and the anchor bolt was thrown in, making it unusable. Similarly, even when cement milk, which is a fixing material, is used for filling, the inside of the perforated hole is immediately collapsed, so that there is a problem that imperfect filling such as not reaching the depth of the perforated hole. Also, when the slope condition is soil, after drilling to some extent with a drilling machine, drilling with air cannot be performed and drilling is often performed with high-pressure water. However, there is a problem that the fixing material cannot be completely filled in the inner part of the hole because the fixing material is obstructed by the water.

Further, in order to fill cement milk as a fixing material to the depth of the perforation, the fluidity of cement milk is increased, but there is a problem that the strength after construction is reduced. There is a problem that a gap is easily formed when the milk hardens.

[0012] In addition, in order to repair a slope that has been conventionally constructed,
In the construction method of spraying a new mortar and repairing it, the old mortar was peeled off and the new construction method was used, but if all the old mortar was peeled off, it became waste and a large amount of waste was discharged It had.

[0013]

SUMMARY OF THE INVENTION In order to solve this problem, the tip of a continuously curved spiral rod is sharpened, and the rear end has a rotary adapter connecting portion. The present invention proposes an anchor bolt for a slope, wherein a groove for reverse rotation is formed in a portion, and a rotation adapter is mounted to enable forward rotation and reverse rotation.

[0014] Further, the tip of the spirally shaped rod-shaped body which is continuously curved is sharpened, and the rear end has a rotary adapter connecting portion, and the rotary adapter connecting portion has a reverse rotation groove formed therein. And a plate-like plate or embedding plate with a tapered hole at the center while enabling normal rotation and reverse rotation.
A slope anchor bolt characterized in that a hemispherical washer that fits into a tapered hole and a tightening nut are detachably provided at a rotary adapter connecting portion.

Further, the tip of the continuously curved spiral rod is sharpened, the rear end has a rotary adapter connecting portion, and the rotary adapter connecting portion has a reverse rotation groove formed therein. After installing the anchor bolt for slope by embedding it in the slope by rotating forward with a rotary drill, using the anchor bolt for the slope that enables forward rotation and reverse rotation, or for the slope provided by the drilling machine After inserting the slope anchor bolt into the hole whose diameter is larger than the spiral diameter of the anchor bolt, fill the fixing material such as mortar around the anchor bolt for slope, then reversely rotate the rotary drill to use the fixed material for slope. We propose a construction method to fix the anchor bolt for slope to the slope by filling it to the tip of the anchor bolt or the inner part of the hole.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION
FIG. 1 is an explanatory view in which a slope anchor bolt is thrown into a hole formed by a drilling machine and a fixing material is thrown into the slope, and FIG. 1 shows a slope anchor bolt made of sandy soil in which a free-standing hole cannot be formed. Fig. 2 is an explanatory view of trying to construct a mortar, Fig. 3 is an explanatory view of constructing a slope anchor bolt for repairing an old mortar construction surface, and a case where a plate plate is attached to the slope anchor bolt. FIG. 4 is an explanatory view of parts of FIG. 5, FIG. 5 is a plan view of an embedding plate to be attached and printed on a slope anchor bolt, and a front view in a case where a plate-like plate is attached and an anchor bolt main body is obliquely inserted into a slope. A description will be given based on FIG.

A slope anchor bolt 1 of the present invention is made of steel, has a tip portion 20 conically pointed, has a rotating adapter connecting portion 21 at a rear end portion, and has a spiral rod-shaped body that curves continuously. An anchor bolt body 2, a rotary adapter 3 attached to the rotary adapter connecting portion 21,
It comprises a rotating drill 4 (or a forward rotating drill and a reverse rotating drill) mounted on the rotating adapter 3.

The anchor bolt main body 2 is formed of a spiral rod that is continuously spirally curved, and the spiral spiral is formed in the same spiral direction as a normal male screw. The distal end portion 20 of the anchor bolt main body 2 is sharpened in a conical shape, and a rotary adapter connecting portion 21 is formed at the rear end portion. The rotation adapter connecting portion 21 has a male screw 210 formed on the outer surface thereof and a reverse rotation groove 211 formed of a vertical groove that is vacant in a diametric direction in which a plate-like body can be inserted in a longitudinal direction from an end. The reverse rotation groove 211 is formed so that the groove engagement plate 30 provided in the cylinder of the rotation adapter 3 can be inserted.

The rotary adapter 3 has a cylindrical shape as a whole, has an opening at the lower surface of the cylindrical shape, and is provided with a groove engaging plate 30 over the inner diameter. The rotary adapter 3 is a rotary drill 4
Can be mounted on the cylindrical upper surface side, and the rotary drill 4 can rotate forward and reverse. Alternatively, a forward rotation drill and a reverse rotation drill may be separately used instead of the rotary drill 4. The rotation adapter 3 is attached only when the anchor bolt body 2 is rotated by the rotation drill 4,
After being inserted into the slope S, it is removed, and the plate-like plate 5 or the embedding plate 8 is attached.

The anchor bolt body 2 comprises a plate-shaped plate 5 having a hemispherical joint surface 50 provided with a hole at the center, a hemispherical washer 6 fitted to the hemispherical joint surface 50, and a tightening nut 7, which is a rotary adapter. It is provided so as to be attachable to the connecting portion 21.

Further, the anchor bolt body 2 is provided with an embedding plate 8 having a hemispherical joint surface 80 formed of a circular reinforcing bar used in place of the plate-like plate 5 and having a hole at the center for repairing and repairing the ground. The hemispherical washer 6 fitted to the hemispherical joint surface 80 and the fastening nut 7 are provided so as to be attachable to the rotary adapter connecting portion 21. Since the embedding plate 8 is formed of a circular reinforcing bar as shown in FIG. 5, the mortar or concrete sprayed easily goes to the back side of the embedding plate 8, so that the anchor bolt 1 for the slope is fixed to the slope. Power is powerful.

The joint surfaces around the holes of the hemispherical joint surface 50 of the plate-like plate 5 and the hemispherical joint surface 80 of the embedding plate 8 are concave hemispherical and convex hemispherical hemispheric washers 6 and 360 degrees. It can be provided at an angle that can be freely changed in the direction. Therefore, the plate-like plate 5 and the embedding plate 8
Can be mounted diagonally. For example, as shown in FIG. 6, even when the anchor bolt main body 2 is obliquely inserted into the slope S, the plate-like plate 5 and the embedding plate 8 are oriented at a 360-degree angle with respect to the anchor bolt main body 2. 6, the plate-shaped plate 5 can be mounted as shown in FIG.
Can be provided substantially parallel to the surface of the slope S.

Next, a method of fixing the slope anchor bolt using the slope anchor bolt 1 will be described.

When the slope anchor bolt 1 is driven into a place where a slope (ground) is required, if the slope is a slope capable of forming a firm internal hole H to some extent by a drilling machine, first, A hole H having a diameter slightly larger than the spiral diameter of the anchor bolt body 2 of the slope anchor bolt 1 and about the depth of the anchor bolt body 2 is formed in the slope by a punch (not shown).

Next, the anchor bolt main body 2 is inserted into the hole H. Rotating adapter connecting part 2 of anchor bolt body 2
1, a rotary adapter 3 is attached, and a rotary drill 4 is connected to the rotary adapter 3. The rotation adapter 3
Since the groove engaging plate 30 is engaged with the reverse rotation groove 211 of the rotary adapter connecting portion 21, even if the rotary drill 4 is reversely rotated (reversely rotated in the male screw direction), the rotary adapter connecting portion 21 of the anchor bolt main body 2 is not rotated. The rotary adapter 3 screwed with the male screw 210 does not come off the male screw 210. Therefore, the rotating drill 4 rotating in the reverse direction does not come off the adapter body 2.

Next, a hole H around the anchor bolt main body 2 will be described.
The fixing material 10 is put therein. The mixed cement used as the fixing material 10 is a mixed cement in which ordinary Portland cement, a dry fine material, a water reducing agent, and water are agitated and stiffened, and the fluidity is further improved by a fluidizing agent. It is a suppressed formulation. Reference numeral 11 denotes a fixing material pressure feeding hose, which causes the fixing material 10 to be inserted into the hole H by a fixing material pressure feeding pump (not shown).

After the fixing material 10 is put into the hole H around the anchor bolt main body 2, the fixing drill 10 around the anchor bolt main body 2 is rotated by rotating the rotary drill 4 in reverse while pressing the anchor bolt main body 2. The hole H is moved inward. Due to the reverse rotation of the anchor bolt main body 2, the fixing material 10 is press-fitted to the inner part of the hole and is reliably filled in the hole H.

Further, when the slope anchor bolt 1 is driven into a place where a slope (ground) is required, the inside of the hole H is collapsed even by the drilling machine on the slope made of sedimentary rock soil or sandy soil. If the self-standing hole is a slope that cannot be formed, the anchor bolt main body 2 is inserted into the slope S by the forward rotation of the rotary drill 4 from the beginning. That is, the rotary adapter 3 is attached to the rotary adapter connecting portion 21 of the anchor bolt main body 2, and the rotary drill 4 is connected to the rotary adapter 3. Next, by rotating the rotary drill 4 forward (the same rotation as the external thread direction), the anchor bolt main body 2 is spirally rotated, and the anchor bolt main body 2 is embedded in the slope S. The anchor bolt main body 2 is relatively easily inserted into the slope S by the action of a spiral when it is rotated forward. In the case of forward rotation, the rotary adapter 3 is rotated in the direction of a male screw, so that the rotary adapter 3 is tightened into the rotary adapter connecting portion 210 and does not come off.

Next, while the fixing material 10 is introduced into the periphery of the anchor bolt main body 2 from the discharge port of the fixing material pressure feeding hose 11, the rotary drill 4 is pressed while holding the anchor bolt main body 2 so as not to come off the slope S. The anchor bolt body 2 is spirally rotated in the reverse direction. As a result, the fixing material 10 continuously supplied around the anchor bolt main body 2 is moved from the slope surface to the tip end of the anchor bolt main body 2 by the spiral reverse rotation of the anchor bolt main body 2 and is filled into the anchor bolt main body 2. Can be done.

In the case where the state of the slope is soil,
Even when drilling with air is not possible and drilling with high-pressure water, water remaining inside the hole H is removed by the pressure of the fixing material 10 press-fitted by the spiral reverse rotation of the anchor bolt main body 2, The fixing material 10 can be completely filled up to the inner part of the hole H.

Anchor bolt main body 2 by rotary drill 4
After the insertion of the fixing member 10 into the hole H or the insertion around the anchor bolt body 2, the rotary adapter 3 and the rotary drill 4 are removed from the anchor bolt body 2. Next, the plate-shaped plate 5 or the embedding plate 8 is fixed to the rotary adapter connecting portion 21 by the hemispherical washer 6 and the fastening nut 7.
At this time, the plate-like plate 50 or the embedding plate 8 can be fixed at an arbitrary angle with respect to the longitudinal direction of the anchor bolt main body 2.

The plate-like plate 5 is provided as it is on the slope S even after being fixed, so that capping is performed to prevent rust. The embedding plate 8 is buried in concrete or mortar because concrete or mortar is sprayed thereon.

Further, when repairing an old slope (ground), first, a filling mortar NM is injected into a gap between the old mortar OM floating on the slope S and the slope S. I do. Further, a hole H is formed at about one place per 1 m ³ from the raised old mortar OM by a drilling machine, and the anchor bolt main body 2 of the slope anchor bolt 1 is inserted. Next, the rotary adapter 3 is attached to the rotary adapter connecting portion 21 of the anchor bolt main body 2, and the rotary drill 4 is connected. Fixing material 10 or
Then, the filling mortar NM is pressed into the hole H of the anchor bolt main body 2. Next, the rotary adapter 3 and the rotary drill 4 are removed from the anchor bolt main body 2, and the embedding plate 8 is mounted near the end of the male screw 210 of the rotary adapter connecting portion 21. The embedding plate 8 is located on the old raised slope S, and from above the raised slope S, a high-quality, high-strength mortar obtained by mixing steel fibers and a unit binder over the entire slope is pumped. Repairing of the slope is performed by spraying by pressure spraying. In this case, since the embedding plate 8 is made of a circular reinforcing bar, the mortar to be sprayed is formed by the embedding plate 8.
Can easily penetrate to the back side of the frame, and the strength of the legal frame is improved.

[0034]

EFFECT OF THE INVENTION Slope of sedimentary rock and sandy soil (ground mountain)
However, since the fixing material can be pressure-fed deep inside the hole for the anchor bolt by the reverse rotation of the spiral of the anchor bolt body, the fixing material can be reliably filled around the slope anchor bolt. The strength of the slope or the formwork to be constructed has been greatly improved.

In the case where the slope is soiled, holes are formed to some extent by a drilling machine, and cannot be drilled by air. Even when drilled by high-pressure water, the holes remain inside the hole bottoms. Since the water can be pushed out by the pressure for pumping the fixing material, the water can be completely removed from the holes, and the construction strength has been improved.

As a result, the fluidity of cement milk, which is a fixing material, can be used with a lower fluidity than before, so that the strength of the slope after construction is improved and the gap formed between the slope and the ground surface is reduced.

In order to repair a slope that has been conventionally constructed,
In the construction method in which new mortar is sprayed and repaired, the old mortar can be repaired without peeling it off, so that it is possible to reduce the discharge of waste.

[Brief description of the drawings]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory view in which a slope anchor bolt is inserted into a hole formed by a punch and a fixing material is injected into the slope.

FIG. 2 is an explanatory view of installing a slope anchor bolt on a slope made of sandy soil in which a self-supporting hole cannot be formed.

FIG. 3 is an explanatory view in the case of installing a slope anchor bolt for repairing an old mortar construction surface.

FIG. 4 is an explanatory view of parts when a plate-like plate is attached to a slope anchor bolt.

FIG. 5 is a plan view of an embedding plate.

FIG. 6 is an explanatory front view showing a case where a plate-like plate is mounted and an anchor bolt main body is obliquely inserted into a slope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Anchor bolt for slope 2 Anchor bolt main body 20 Tip part 21 Rotation adapter connection part 210 Male screw 211 Reverse rotation groove 3 Rotation adapter 30 Groove engagement plate 4 Rotation drill 5 Plate plate 50 Hemisphere joint surface 6 Hemisphere washer 7 Tightening Nut 8 Embedding plate 80 Hemisphere joint surface 10 Fixing material 11 Fixing material pumping hose H hole S Slope OM Old raised mortar NM New mortar (for filling and surface)

Claims (3)

[Claims] 1. A rotary adapter, comprising: a spirally curved rod-shaped body which is continuously curved, having a sharpened front end, a rotary adapter connecting portion at a rear end portion, and a reverse rotation groove formed in the rotary adapter connecting portion. An anchor bolt for a slope, wherein the anchor bolt can be rotated forward and backward. 2. The rotary adapter according to claim 1, wherein the tip of the spirally-shaped rod that is continuously curved is sharpened, a rotary adapter connecting portion is provided at a rear end portion, and a reverse rotation groove is formed in the rotary adapter connecting portion. A plate-shaped plate or embedding plate with a tapered hole in the center, a hemispherical washer that fits into the tapered hole, and a tightening nut A slope anchor bolt, which is detachably provided on a surface. 3. The rotary adapter according to claim 1, wherein the tip portion of the spiral rod continuously curved is sharpened, a rotary adapter connecting portion is provided at a rear end portion, and a reverse rotation groove is formed in the rotary adapter connecting portion. After installing the anchor bolt for slope by embedding it in the slope by rotating forward with a rotary drill, using the anchor bolt for the slope that enables forward rotation and reverse rotation, or for the slope provided by the drilling machine After inserting the slope anchor bolt into the hole whose diameter is larger than the spiral diameter of the anchor bolt, fill the fixing material such as mortar around the anchor bolt for slope, then reversely rotate the rotary drill to use the fixed material for slope. An installation method that fills the anchor bolt tip or the inside of the hole and fixes the slope anchor bolt to the slope.